Contact Us: 1-800-255-2771
Environmental and Geotechnical Construction Services
Follow Us

Utilities

MGP Site Remediation - Midwest

Phase I

  • Remediation at this former MGP site in preparation for future redevelopment
  • Demolition, removal, and off-site disposal of extensive subsurface structures
  • Excavation and off-site disposal of 20,862 tons of MGP-impacted soils and debris
  • In-Situ Solidification/Stabilization (ISS) of 33,361 CY of MGP impacted soils up to 34 feet below ground surface

Phase II

  • Excavation and off-site disposal of 5,400 tons of MGP impacted soil, debris and concrete
  • In-Situ Solidification/Stabilization (ISS) of 24,678 CY of MGP impacted soils up to 25 feet deep
  • Management of 3,208 CY of swell through immediate in-place grading or reconditioning

ENTACT completed remediation activities at this former MGP site in preparation for future redevelopment by the City. The site is located in a mixed-use downtown area near a major Lake, with current commercial and residential site uses that include a hotel, restaurant, condominiums, a boat mooring facility, and a city parking structure. Through two phases of work, ENTACT performed demolition, removal and off-site disposal or recycling of building slabs and subsurface structures, including gas holders, purifier boxes, a power house outlet, piping, over-sized debris, and timber piles; collection, management, treatment and discharging of MGP contact water; removal, re-installation or protection of utilities; plugging and grouting abandoned pipes; excavation and off-site disposal of 26,262 tons of MGP impacted soils; in-situ solidification/stabilization (ISS) of 58,039 CY of MGP impacted soils up to 34 feet deep; management of 9,608 CY of swell through immediate in-place grading or reconditioning and placement in a former building footprint; and site restoration.

ISS was accomplished by installing 10-Foot diameter overlapping soil-cement-slag columns using ENTACT’s Delmag RH-32 Caisson Type Drill Rig equipped with a 10-Foot Auger and ENTACT’s customized grout batch plant. Areas that overlapped the Phase I stabilized monolith were treated using excavator bucket mixing.